// basic application data class 
#pragma once 

#include <string> 

class Account
{
private:
    std::string accountId;

    long balance;

public:
    Account();

    Account(const std::string& accountId, long initialBalance);

    void debit(long amount);

    void credit(long amount);

    long getBalance() const;

    std::string getAccountId() const;
};